Ventilating device for railway-cars.



PATENTED JULY 14, 1908.

F. BRANDT. VENTILATING'DEVIGE FOR RAILWAY CARS.

A PPLIOATION FILED JUNE 2, 190B.

INVENTOH.

ATTORNEYS.

WITNESSES I FRITZ BRANDT, OF BREMEN, GERMANY.

VENTILATING DEVICE FOR RAILWAY-CARS.

Specification of Letters Patent.

Patented July 14, 1908.

Application filed June 2,1908. Serial No. 436,195.

-To all whom it may concern:

Be it known that I, Fnrrz BRANDT, a subject of the German Emperor, and residing at Bremen, Germany, have invented certain new and useful Improvements in Ventilating Devices for Railway-Cars, of which the following is a specification.

The object of the invention is to provide automatic ventilating means which will be simple and compact in structure and effective in operation.

In order that the invention may be clearly understood, reference is made to the accompanying drawing in which one embodiment is represented by way of example, and in which:

Figure 1 is a vertical section through the ventilating means, and Fig. 2 is a horizontal section in the plane a-b in Fig. 1.

Referring to the drawing, 1 is the front wall of a casing 2. In the front wall 1 there are provided openings 3 which can be regulated in size by a sliding plate 4 having similar openings 5. This plate 4 is moved by hand or any suitable means. Now in the casing 2 situated behind the front wall 1 there is arranged, firstly, one single fan 7 in a bow or hoop 6 disposed in a central fan chamber 6. A rotary exhaust or pressure blower is disposed in the casing with its axis transverse thereto. This rotary fan or blower has a set of beveled or inclined blades 7, which, in connection with the arrangement of channels and openings herein described, are adapted to receive a peripheral driving current, below said axis when,the car is moving in one direction and a peripheral driving current above said axis when the car is moving in the opposite direction, the same blades which receive the impelling currents being operative to cause a lateral ventilating current through the said open ings 3 in the easing into or out of the car. Two channels 10 and 11 are made in the casing 2 by means of walls 8 and 9, of which the one channel 10 opens at its outer end at one end of the casing and at its inner end. at the lower part of the fan 7, and the other channel 11 opens at its outer end at the other end of the casing and at its inner end at the upper part of the same. In this manner it is possible for the fan 7 to rotate constantly in the same direction, whether the car moves in one direction or the other. In the drawing it is supposed that the car is moving to the left, so that the driving current of air enters through the channel 10, exercises its influence on the lower part of the fan 7, causes it to rotate counter-clockwise, passes up the curved wall 8 and flows out through the channel 11. If the car moves in the opposite direction, air enters through the channel 11, acts on the upper part of the fan 7 causes it to rotate in the same direction as before and flows out through channel 10. Now when the fan 7 rotates counter-clockwise, it will exercise a suction effect on the interior of the car and thus suck away the impure air from the car through the holes 5 and 3. Of course, by arranging the channels 10 and 11 in an exactly opposite manner, the fan 7 can be rotated in-the opposite direction, so that it ered at the rear with a layer of gauze or porousv material IZWhiCh allows air to pass through freely, but keeps back sparks, particles of dust, soot and the like.

In the drawing the channels which cause the wheel 7 to rotate are simultaneously intended to conduct away the airwhich is sucked from the interior of the car.

What I, claim as my invention and desire to secure by Letters Patent is:

A ventilator for a railway car comprising a casing having a central fan chamber, driving channels open at their outer ends at opposite ends of said casing and at their inner ends into said fan chamber one above and the other below the center thereof and ventilating openings in a side Wall of said casing opposite said chamber and channels, and a rotary fan disposed in said chamber on an axis transverse thereof, the blades of said fan being exposed to an impelling current through either of said channels for driving as my invention, I have signed my name in the fan in the same diiection wltilclaeveigway presence of tWo subscribing Witnesses. the car moves and t e same a es eing beveled or inclined to said openings and FRITZ BRANDT 5 0 erative to create a forced draft laterally Witnesses:

t erethrough. FERDINAND REIOH,

In testimony, that I claim the foregoing FREDERICK HOYERMANN. 

